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OS X 10.10 Yosemite is now available free from the Mac App Store. Anyone who has purchased Mac OS X 10.6 Snow Leopard, OS X 10.7 Lion, or OS X 10.8 Mountain Lion, or has OS X 10.9 Mavericks will be able to upgrade for no cost.
Necessary for Yosemite Update
To proceed with installation, you absolutely need the following.
When performing any full operating system upgrade, unexpected things can occur. To avoid data loss, these best practices should be adhered to. This upgrade should be a breeze, but if things do go wrong, you can always go back to your working installation.
OS X Yosemite is one of the biggest changes to OS X in a long time. Besides new features, redesigned icons, and a new system font, there are a few things that are functionally different this time around. Here is a partial list of things to know before attempting an update or a fresh installation.
Related:
Backup Solutions For Your Mac or CustoMac
Necessary for Yosemite Update
To proceed with installation, you absolutely need the following.
- Intel Core 2 or above, 64 bit CPU
- A computer running Mac OS X 10.6.8 or later
- Mac App Store Account
- Internet access to download the Yosemite Install App through Mac App Store
- About 5GB free hard drive space available in /Applications
When performing any full operating system upgrade, unexpected things can occur. To avoid data loss, these best practices should be adhered to. This upgrade should be a breeze, but if things do go wrong, you can always go back to your working installation.
- Back Up All of Your Data
- Buy a spare 8GB USB drive
- Clone your working drive
OS X Yosemite is one of the biggest changes to OS X in a long time. Besides new features, redesigned icons, and a new system font, there are a few things that are functionally different this time around. Here is a partial list of things to know before attempting an update or a fresh installation.
- The location of the OS X system kernel has changed from /mach_kernel to /System/Library/Kernels/kernel.
- Any patched or unsigned drivers installed to /System/Library/Extensions/ now require a special boot flag to load: kext-dev-mode=1
- 9 Series motherboard quick fixes for audio and graphics are no longer necessary.
- Mobile HD 4600 Device IDs have been removed. Patched drivers or ID injection is necessary.
- Older systems with AWARD BIOS may need to roll back AppleACPIPlatform.kext to the 10.9.5 version. This includes all 6 Series and X58 Gigabyte motherboards.
Related:
Backup Solutions For Your Mac or CustoMac